<template>
  <div class="loginInput">
    <div class="inputBox">
      <el-form ref="loginFormRef" :model="loginform" class="login_form" :rules="loginFormRules">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginform.username" prefix-icon="el-icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginform.password" type="password" prefix-icon="el-icon-lock"></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: 'LoginInput',
  data () {
    return {
      loginform: {
        username: 'admin',
        password: '123456'
      },
      // 表单的验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 5, max: 11, message: '长度在 5 到 11 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginform)
        // console.log(res)
        if (res.meta.status !== 200) return this.$message.error('登陆失败')
        this.$message.success('登陆成功')
        // 1.将登陆成功之后的token，保存到客户端的sessionStorage中
        // 1.1项目中出了登陆之外的其它API接口，必须在登陆之后才能访问
        // 1.2token只应在当前网站打开期间生效吗，所以讲token保存在sessionStore中
        window.sessionStorage.setItem('token', res.data.token)
        window.localStorage.setItem('purview', res.data.purview)
        // 2.通过编程式导航跳转到后天主页，路由地址是/home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style scoped lang='scss'>
.loginInput {
  .inputBox {
    position: absolute;
    width: 400px;
    height: 200px;
    padding-top: 30px;
    background-color: rgb(220, 212, 212);
    border-radius: 3px;
    left: 50%;
    right: 50%;
    transform: translate(-50%, 50%);
    opacity: 0.8;
    .login_form {
      width: 80%;
      height: 80%;
      margin: 10px auto;
      .btns {
        display: flex;
        justify-content: space-around;
      }
    }
  }
}
</style>
